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# Build a shared libgcc library with the darwin linker.

SHLIB_SOVERSION = 1

SHLIB_VERSTRING = -compatibility_version $(SHLIB_SOVERSION) -current_version $(SHLIB_SOVERSION).0

SHLIB_EXT = .dylib

SHLIB_INSTALL_NAME = @shlib_base_name@.$(SHLIB_SOVERSION)$(SHLIB_EXT)

SHLIB_SONAME = @shlib_base_name@$(SHLIB_EXT)

SHLIB_SOLINK = @shlib_base_name@.so

SHLIB_MAP = @shlib_map_file@

SHLIB_OBJS = @shlib_objs@

SHLIB_DIR = @multilib_dir@

SHLIB_LC = -lc

# Darwin only searches in /usr/lib for shared libraries, not in subdirectories,

# so the libgcc variants have different names not different locations.

# Note that this version is used for the loader, not the linker; the linker

# uses the stub versions named by the versioned members of $(INSTALL_FILES).

SHLIB_LINK = $(CC) $(LIBGCC2_CFLAGS) -dynamiclib -nodefaultlibs \

        -install_name @shlib_slibdir@/$(SHLIB_INSTALL_NAME) \

        -single_module -o $(SHLIB_DIR)/$(SHLIB_SONAME) \

        -Wl,-exported_symbols_list,$(SHLIB_MAP) \

        $(SHLIB_VERSTRING) \

        @multilib_flags@ $(SHLIB_OBJS) $(SHLIB_LC)

SHLIB_MKMAP = $(srcdir)/mkmap-flat.awk

SHLIB_MKMAP_OPTS = -v leading_underscore=1

SHLIB_MAPFILES = libgcc-std.ver $(srcdir)/config/libgcc-libsystem.ver

SHLIB_VERPFX = $(srcdir)/config/$(cpu_type)/libgcc-darwin

# we're only going to build the stubs if the target slib is /usr/lib

# there is no other case in which they're useful in a live system.

ifeq (/usr/lib,$(shlib_slibdir))

LGCC_STUBS = libgcc_s.10.4.dylib libgcc_s.10.5.dylib

else

LGCC_STUBS =

endif

LGCC_FILES = libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)

LGCC_FILES += $(LGCC_STUBS)

LEXT_STUBS = libgcc_ext.10.4$(SHLIB_EXT) libgcc_ext.10.5$(SHLIB_EXT)

LGCC_FILES += $(LEXT_STUBS)

INSTALL_FILES=$(LGCC_FILES)

# we do our own thing

SHLIB_INSTALL =

# For the toplevel multilib, build a fat archive including all the multilibs.

ifeq ($(MULTIBUILDTOP),)

ifeq ($(enable_shared),yes)

all: $(INSTALL_FILES)

install-leaf: install-darwin-libgcc-stubs

endif

# In order to support -mmacosx-version-min, you need to have multiple

# different libgcc_s libraries that actually get linked against, one for

# each system version supported.  They are 'stub' libraries that

# contain no code, just a list of exported symbols.

# The actual use of the libraries is controlled by REAL_LIBGCC_SPEC.

#

# This assumes each multilib corresponds to a different architecture.

libgcc_s.%.dylib : all-multi $(SHLIB_VERPFX).%.ver libgcc_s$(SHLIB_EXT)

        MLIBS=`$(CC) --print-multi-lib | sed -e 's/;.*$$//'` ; \

        for mlib in $$MLIBS ; do \

          $(STRIP) -o $(@)_T$${mlib} \

            -s $(SHLIB_VERPFX).$(*).ver -c -u \

            ../$${mlib}/libgcc/$${mlib}/libgcc_s$(SHLIB_EXT)  || exit 1 ; \

        done

        $(LIPO) -output $@ -create $(@)_T*

        rm $(@)_T*

libgcc_ext.%.dylib : all-multi $(SHLIB_VERPFX).%.ver libgcc_s$(SHLIB_EXT)

        MLIBS=`$(CC) --print-multi-lib | sed -e 's/;.*$$//'` ; \

        for mlib in $$MLIBS ; do \

          $(STRIP) -o $(@)_T$${mlib} \

            -R $(SHLIB_VERPFX).$(*).ver -c -urx \

            ../$${mlib}/libgcc/$${mlib}/libgcc_s$(SHLIB_EXT) || exit 1 ; \

        done

        $(LIPO) -output $@ -create $(@)_T*

        rm $(@)_T*

libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT): all-multi libgcc_s$(SHLIB_EXT)

        MLIBS=`$(CC) --print-multi-lib | sed -e 's/;.*$$//'` ; \

        for mlib in $$MLIBS ; do \

          cp ../$${mlib}/libgcc/$${mlib}/libgcc_s$(SHLIB_EXT)  \

            ./libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T_$${mlib} || exit 1 ; \

        done

        $(LIPO) -output libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT) \

          -create libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T*

        rm libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T*

install-darwin-libgcc-stubs :

        $(mkinstalldirs) $(DESTDIR)$(slibdir)

        for d in $(INSTALL_FILES) ; do \

          $(INSTALL_DATA) $$d $(DESTDIR)$(slibdir)/$$d || exit 1 ; \

        done

        if [ -f $(DESTDIR)$(slibdir)/libgcc_s_ppc64.1.dylib ]; then \

          rm -f $(DESTDIR)$(slibdir)/libgcc_s_ppc64.1.dylib; \

        else true; fi

        $(LN_S) libgcc_s.1.dylib \

                $(DESTDIR)$(slibdir)/libgcc_s_ppc64.1.dylib

        if [ -f $(DESTDIR)$(slibdir)/libgcc_s_x86_64.1.dylib ]; then \

          rm -f $(DESTDIR)$(slibdir)/libgcc_s_x86_64.1.dylib; \

        else true; fi

        $(LN_S) libgcc_s.1.dylib \

                $(DESTDIR)$(slibdir)/libgcc_s_x86_64.1.dylib

else

# Do not install shared libraries for any other multilibs.  Unless

# we're putting them in the gcc directory during a build, for

# compatibility with the pre-top-level layout.  In that case we

# need symlinks.

ifeq ($(enable_shared),yes)

all: install-darwin-libgcc-links

endif

install-darwin-libgcc-links:

        $(mkinstalldirs) $(gcc_objdir)$(MULTISUBDIR)

        for file in $(INSTALL_FILES); do                        \

          rm -f $(gcc_objdir)$(MULTISUBDIR)/$$file;             \

          $(LN_S) ../$$file $(gcc_objdir)$(MULTISUBDIR)/;       \

        done

        rm -f $(gcc_objdir)$(MULTISUBDIR)/libgcc_s_x86_64.1.dylib

        $(LN_S) libgcc_s.1.dylib \

                $(gcc_objdir)$(MULTISUBDIR)/libgcc_s_x86_64.1.dylib

        rm -f $(gcc_objdir)$(MULTISUBDIR)/libgcc_s_ppc64.1.dylib

        $(LN_S) libgcc_s.1.dylib \

                $(gcc_objdir)$(MULTISUBDIR)/libgcc_s_ppc64.1.dylib

endif